公开(公告)号：US06975254B1

公开(公告)日：2005-12-13

申请号：US09869401

申请日：1998-12-28

申请人： Ralph Sperschneider ,  Martin Dietz ,  Andreas Ehret ,  Karlheinz Brandenburg ,  Heinz Gerhaeuser ,  Ali Nowbakht-Irani ,  Pierre Lauber ,  Roland Bitto

发明人： Ralph Sperschneider ,  Martin Dietz ,  Andreas Ehret ,  Karlheinz Brandenburg ,  Heinz Gerhaeuser ,  Ali Nowbakht-Irani ,  Pierre Lauber ,  Roland Bitto

IPC分类号： G10L19/02 ,  G10L19/032 ,  H03M7/00 ,  H03M7/30 ,  H03M7/40 ,  H03M13/35 ,  H04B1/66 ,  H04H20/00

CPC分类号： G10L19/032 ,  G10L19/0212 ,  H03M7/40 ,  H03M13/35 ,  H04B1/662

摘要： In a method for coding an audio signal to obtain a coded bit stream, discrete-time samples of the audio signal are transformed into the frequency domain to obtain spectral values. The spectral values are coded with a code table having a limited number of code words of different lengths to obtain spectral values coded by code words, the length of a code word assigned to a spectral value being that much shorter the higher the probability of occurrence of the spectral value is. A raster is then specified for the coded bit stream, the raster having equidistant raster points and the distance between the raster points depending on the code table(s) used. In order to obtain error-tolerant Huffman coding, priority code words, which represent particular spectral values which are psychoacoustically more important than other spectral values, are so arranged in the raster that the start of each priority code word coincides with a raster point.

摘要翻译： 在用于编码音频信号以获得编码比特流的方法中，音频信号的离散时间采样被变换到频域以获得频谱值​​。 频谱值用具有不同长度的有限数量的码字的码表编码，以获得由码字编码的频谱值，分配给频谱值的码字的长度远短于发生概率的频率值 光谱值为。 然后为编码比特流指定光栅，光栅具有等距的光栅点，并且根据所使用的代码表，光栅点之间的距离。 为了获得容错霍夫曼编码，代表在心理学上比其他频谱值更重要的特定频谱值的优先码字被布置在光栅中，每个优先码字的开始与光栅点重合。

公开(公告)号：US06826525B2

公开(公告)日：2004-11-30

申请号：US10183139

申请日：2002-06-25

申请人： Johannes Hilpert ,  Jürgen Herre ,  Bernhard Grill ,  Rainer Buchta ,  Karlheinz Brandenburg ,  Heinz Gerhäuser

发明人： Johannes Hilpert ,  Jürgen Herre ,  Bernhard Grill ,  Rainer Buchta ,  Karlheinz Brandenburg ,  Heinz Gerhäuser

IPC分类号： G10L1900

CPC分类号： H04B1/665

摘要： A method for detecting a transient in a discrete-time audio signal is performed completely in the time domain and includes the step of segmenting the discrete-time audio signal so as to generate consecutive segments of the same length with unfiltered discrete-time audio signals xs(T−1). The discrete-time audio signal in a current segment is subsequently filtered. Then either the energy of the filtered discrete-time audio signal in the current segment can be compared with the energy of the filtered discrete-time audio signal in a preceding segment or a current relationship between the energy of the filtered discrete-time audio signal in the current segment and the energy of the unfiltered discrete-time audio signal in the current segment can be formed and this current relationship compared with a preceding corresponding relationship. On the basis of the one and/or the other of these comparisons it is detected whether a transient is present in the discrete-time audio signal.

摘要翻译： 用于检测离散时间音频信号中的瞬态的方法在时域中完全执行，并且包括分段离散时间音频信号以便生成具有未滤波的离散时间音频信号xs的相同长度的连续片段的步骤 （T-1）。 随后过滤当前片段中的离散时间音频信号。 然后可以将当前段中滤波的离散时间音频信号的能量与前一段中滤波的离散时间音频信号的能量或滤波后的离散时间音频信号的能量之间的当前关系进行比较 可以形成当前段的当前段和未过滤离散时间音频信号的能量，并将该当前关系与先前的对应关系进行比较。 基于这些比较中的一个和/或另一个，检测离散时间音频信号中是否存在瞬态。

公开(公告)号：US06750789B2

公开(公告)日：2004-06-15

申请号：US10168456

申请日：2002-10-25

申请人： Juergen Herre ,  Karlheinz Brandenburg ,  Thomas Sporer ,  Michael Schug ,  Wolfgang Schildbach

发明人： Juergen Herre ,  Karlheinz Brandenburg ,  Thomas Sporer ,  Michael Schug ,  Wolfgang Schildbach

IPC分类号： H03M700

CPC分类号： G10L19/02

摘要： In determining a coding block raster on which a decoded signal is based, a segment of the decoded signal is picked out first, said segment beginning at a certain output sampling value of the decoded signal. Said segment is then converted into a spectral representation, whereupon said spectral representation is then evaluated in relation to a predetermined criterion in order to obtain an evaluation result for the segment. This procedure is repeated for a plurality of different segments beginning at different output sampling values each, in order to obtain a plurality of evaluation results. Finally, the plurality of the evaluation results is searched in order to establish the evaluation result that has an extreme value as compared to the other evaluation results, in such a way that it can be assumed that the segment to which this evaluation result is allocated matches the coding block raster on which the decoded signal is based. This method can be used to determine the coding block raster for any decoded signal that has no explicit information about its coding block raster.

摘要翻译： 在确定解码信号所基于的编码块光栅时，首先选择解码信号的片段，所述片段以解码信号的特定输出采样值开始。 然后将所述段转换为频谱表示，然后根据预定标准对所述频谱表示进行评估，以获得该段的评估结果。 对于从不同的输出采样值开始的多个不同的段重复该过程，以获得多个评估结果。 最后，搜索多个评估结果以便建立与其他评估结果相比具有极值的评估结果，使得可以假定分配了该评估结果的分段匹配 解码信号所基于的编码块光栅。 该方法可以用于确定任何没有关于其编码块光栅的显式信息的解码信号的编码块栅格。

公开(公告)号：US5926553A

公开(公告)日：1999-07-20

申请号：US817749

申请日：1997-07-21

申请人： Michael Keyhl ,  Jurgen Herre ,  Christian Schmidmer ,  Karlheinz Brandenburg ,  Dieter Seitzer

发明人： Michael Keyhl ,  Jurgen Herre ,  Christian Schmidmer ,  Karlheinz Brandenburg ,  Dieter Seitzer

IPC分类号： H04S1/00 ,  H04S7/00 ,  H04H5/00

CPC分类号： H04S1/007 ,  H04S7/00

摘要： Jointly processed stereophonic audio signal properties are identified using a stereophonic signal as reference signal and creating a signal for testing by processing the stereophonic signal, e.g. by coding and subsequently decoding it. Both signals are transformed into the frequency domain to create representative spectral data for the respective subbands. Correlation coefficients are determined for each subband both of the reference signal and also of the signal for testing on the basis of the spectral data of the channels of the reference signal or of the signal for testing. From the comparison of the correlation coefficients belonging to the same subband, jointly processed stereophonic audio signals are detected if at least one of the correlation coefficients of the signal for testing greatly exceeds the correlation coefficient of the reference signal for the same subband.

摘要翻译： PCT No.PCT / EP95 / 04008 Sec。 371日期1997年7月21日 102（e）日期1997年7月21日PCT提交1995年10月11日PCT公布。 出版物WO96 / 12384 日期：1996年04月25日使用立体声信号作为参考信号来识别立体声音频信号特性，并通过处理立体声信号来产生用于测试的信号。 通过编码并随后对其进行解码。 两个信号被转换成频域以产生各个子带的代表性光谱数据。 基于参考信号或测试信号的频谱数据，确定参考信号和测试信号的每个子带的相关系数。 从属于相同子带的相关系数的比较来看，如果用于测试的信号的相关系数中的至少一个大大超过相同子带的参考信号的相关系数，则检测出联合处理的立体声音频信号。

公开(公告)号：US5736943A

公开(公告)日：1998-04-07

申请号：US557046

申请日：1996-05-31

申请人： Jurgen Herre ,  Bernhard Grill ,  Ernst Eberlein ,  Karlheinz Brandenburg ,  Dieter Seitzer

发明人： Jurgen Herre ,  Bernhard Grill ,  Ernst Eberlein ,  Karlheinz Brandenburg ,  Dieter Seitzer

IPC分类号： G10L19/00 ,  G10L19/008 ,  G10L19/02 ,  H03M7/30 ,  H04B1/66 ,  H04H1/00 ,  H04H20/47 ,  H04H60/09 ,  H04N5/00 ,  H04S1/00 ,  D03M7/00

CPC分类号： H04S1/007 ,  G10L19/008 ,  H04B1/665

摘要： In the case of coding a plurality of signals which are not independent of e another, a selection of the suitable type of coding is made as a function of a similarity measure. According to one aspect of the invention, the similarity measure is determined by firstly coding one of the signals according to the intensity-stereo method and then decoding it in order to create a signal affected by coding error, whereupon the latter signal and the associated non-coded signal are transformed into the frequency domain. In the frequency domain, a selection or evaluation of the actually audible spectral components, as well as of the signal affected by coding error and of the associated signal not affected by coding error, is undertaken using a listening threshold which is determined by a psycho-acoustic calculation. Intensity-stereo coding is undertaken in the case of a high similarity measure, whereas otherwise a separate coding of the channels is performed.

摘要翻译： PCT No.PCT / EP94 / 02250 Sec。 371日期：1996年5月31日 102（e）日期1996年5月31日PCT提交1994年7月8日PCT公布。 公开号WO95 / 08227 日期1995年3月23日在对不是彼此独立的多个信号进行编码的情况下，作为相似性度量的函数进行适当的编码类型的选择。 根据本发明的一个方面，通过首先根据强度立体声方法对信号之一进行编码，然后对其进行解码来确定相似性度量，以便产生受编码错误影响的信号，由此产生后一信号和相关联的非信号 编码信号被转换成频域。 在频域中，使用由精神病理学家确定的听力阈值来进行实际可听频谱分量的选择或评估，以及受编码错误影响的信号和不受编码错误影响的相关信号， 声学计算。 在高相似性度量的情况下进行强度立体声编码，否则执行信道的单独编码。

公开(公告)号：US20120065964A1

公开(公告)日：2012-03-15

申请号：US13301324

申请日：2011-11-21

申请人： Christian NEUBAUER ,  Juergen HERRE ,  Karlheinz BRANDENBURG ,  Eric ALLAMANCHE

发明人： Christian NEUBAUER ,  Juergen HERRE ,  Karlheinz BRANDENBURG ,  Eric ALLAMANCHE

IPC分类号： G10L19/02 ,  H04B1/66

CPC分类号： H04H20/31 ,  G10L19/018 ,  G10L19/02 ,  H04B1/707

摘要： Techniques for introducing information into a data stream first obtains the spectral values of the short-term spectrum of the audio signal. Separately, information to be introduced are combined with a spread sequence obtaining a spread information signal, whereupon a spectral representation of the spread information is generated, then weighted with an established psychoacoustic maskable noise energy to generate a weighted information signal, wherein energy of the introduced information is substantially equal to or below the psychoacoustic masking threshold. The weighted information signal and the spectral values of the short-term spectrum of the audio signal are then summed and afterwards processed again to obtain a processed data stream including audio information and information to be introduced. Because the information to be introduced are introduced without changing to the time domain, the block rastering underlying the short-term spectrum are not touched, thus introducing a watermark will not lead to tandem encoding effects.

摘要翻译： 将信息引入数据流的技术首先获得音频信号的短期频谱的频谱值。 单独地，要引入的信息与获得扩展信息信号的扩展序列组合，从而生成扩展信息的频谱表示，然后用已建立的心理声学可屏蔽噪声能量进行加权，以产生加权信息信号，其中引入的能量 信息基本上等于或低于心理声学屏蔽阈值。 然后，将加权信息信号和音频信号的短期频谱的频谱值相加，然后再次进行处理，以获得包括音频信息和要引入的信息的处理数据流。 由于在不改变时域的情况下引入要引入的信息，因此不会触及短期频谱下的块划像，因此引入水印不会导致串联编码效果。

公开(公告)号：US08117027B2

公开(公告)日：2012-02-14

申请号：US12238365

申请日：2008-09-25

申请人： Christian Neubauer ,  Juergen Herre ,  Karlheinz Brandenburg ,  Eric Allamanche

发明人： Christian Neubauer ,  Juergen Herre ,  Karlheinz Brandenburg ,  Eric Allamanche

IPC分类号： G10L19/02 ,  H04B1/66 ,  H04B1/69

CPC分类号： H04H20/31 ,  G10L19/018 ,  G10L19/02 ,  H04B1/707

摘要： Techniques for introducing information into a data stream first obtains the spectral values of the short-term spectrum of the audio signal. Separately, information to be introduced are combined with a spread sequence obtaining a spread information signal, whereupon a spectral representation of the spread information is generated, then weighted with an established psychoacoustic maskable noise energy to generate a weighted information signal, wherein energy of the introduced information is substantially equal to or below the psychoacoustic masking threshold. The weighted information signal and the spectral values of the short-term spectrum of the audio signal are then summed and afterwards processed again to obtain a processed data stream including audio information and information to be introduced. Because the information to be introduced are introduced without changing to the time domain, the block rastering underlying the short-term spectrum are not touched, thus introducing a watermark will not lead to tandem encoding effects.

摘要翻译： 将信息引入数据流的技术首先获得音频信号的短期频谱的频谱值。 单独地，要引入的信息与获得扩展信息信号的扩展序列组合，从而生成扩展信息的频谱表示，然后用已建立的心理声学可屏蔽噪声能量进行加权，以产生加权信息信号，其中引入的能量 信息基本上等于或低于心理声学屏蔽阈值。 然后，将加权信息信号和音频信号的短期频谱的频谱值相加，然后再次进行处理，以获得包括音频信息和要引入的信息的处理数据流。 由于在不改变时域的情况下引入要引入的信息，因此不会触及短期频谱下的块划像，因此引入水印不会导致串联编码效果。

公开(公告)号：US07454327B1

公开(公告)日：2008-11-18

申请号：US10089950

申请日：2000-10-05

申请人： Christian Neubauer ,  Juergen Herre ,  Karlheinz Brandenburg ,  Eric Allamanche

发明人： Christian Neubauer ,  Juergen Herre ,  Karlheinz Brandenburg ,  Eric Allamanche

IPC分类号： G10L19/02 ,  H04B1/69

CPC分类号： H04H20/31 ,  G10L19/018 ,  G10L19/02 ,  H04B1/707

摘要： An inventive method for introducing information into a data stream including data about spectral values representing a short-term spectrum of an audio signal first performs a processing of the data stream to obtain the spectral values of the short-term spectrum of the audio signal. Apart from that, the information to be introduced are combined with a spread sequence to obtain a spread information signal, whereupon a spectral representation of the spread information is generated which will then be weighted with an established psychoacoustic maskable noise energy to generate a weighted information signal, wherein the energy of the introduced information is substantially equal to or below the psychoacoustic masking threshold. The weighted information signal and the spectral values of the short-term spectrum of the audio signal will then be summed and afterwards processed again to obtain a processed data stream including both audio information and information to be introduced. By the fact that the information to be introduced are introduced into the data stream without changing to the time domain, the block rastering underlying the short-term spectrum will not be touched, so that introducing a watermark will not lead to tandem encoding effects.

摘要翻译： 将信息引入包括表示音频信号的短期频谱的频谱值的数据的数据流的创新方法首先执行数据流的处理以获得音频信号的短期频谱的频谱值。 除此之外，将要引入的信息与扩展序列组合以获得扩展信息信号，从而生成扩展信息的频谱表示，然后将其利用已建立的心理声学可屏蔽噪声能量进行加权，以产生加权信息信号 ，其中所引入的信息的能量基本上等于或低于心理声学掩蔽阈值。 然后将加权信息信号和音频信号的短期频谱的频谱值相加，然后再次处理，以获得包括音频信息和要引入的信息的处理数据流。 由于将要引入的信息被引入到数据流而不改变到时域的事实，所以短期频谱下面的块划像不会被触及，所以引入水印不会导致串联编码效应。

公开(公告)号：US20080206731A1

公开(公告)日：2008-08-28

申请号：US11995563

申请日：2006-09-06

申请人： Fanny Bastianova-Klett ,  Karlheinz Brandenburg

发明人： Fanny Bastianova-Klett ,  Karlheinz Brandenburg

IPC分类号： G09B7/00

CPC分类号： G09B7/00

摘要： An apparatus for compiling a test comprises a database having a plurality of test tasks stored therein, each test task being associated with a task type, means for selecting test tasks from the database to obtain a multitude of selected test tasks, and means for outputting the selected test tasks of the test to a user. The means for selecting test tasks comprises means for selecting, for a task type, at least one test task from the database and for taking the selected test task over to the multitude of selected test tasks if a test task for the task type is available in the database, and an exception-handling logic configured to search the database, for a task type for which no test task is available in the database, for a replacement test task according to a given replacement rule and take same over to the multitude of selected tasks.

摘要翻译： 用于编译测试的装置包括具有存储在其中的多个测试任务的数据库，每个测试任务与任务类型相关联，用于从数据库中选择测试任务以获得大量所选择的测试任务的装置，以及用于输出 所选测试任务的测试给用户。 用于选择测试任务的手段包括用于为任务类型选择来自数据库的至少一个测试任务并且用于将所选择的测试任务转移到多个所选择的测试任务的装置，如果任务类型的测试任务可用于 该数据库和一个异常处理逻辑被配置为根据给定的替换规则为替换测试任务针对数据库中没有测试任务可用的任务类型搜索数据库，并将其与多个所选择的 任务。

公开(公告)号：US07343287B2

公开(公告)日：2008-03-11

申请号：US10636149

申请日：2003-08-07

申请人： Ralf Geiger ,  Thomas Sporer ,  Karlheinz Brandenburg ,  Juergen Herre ,  Juergen Koller ,  Gerald Schuller

发明人： Ralf Geiger ,  Thomas Sporer ,  Karlheinz Brandenburg ,  Juergen Herre ,  Juergen Koller ,  Gerald Schuller

IPC分类号： G10L19/00

CPC分类号： G10L19/032 ,  G06F17/147 ,  G10L19/24

摘要： An apparatus for scalable encoding a spectrum of a signal including audio and/or video information, with the spectrum comprising binary spectral values, includes a means for generating a first sub-scaling layer and a second sub-scaling layer in addition to a means for forming the encoded signal, with the means for forming being implemented so as to include the first sub-scaling layer and the second sub-scaling layer into the encoded signal that the first and the second sub-scaling layer are separately decodable from each other. In contrast to a full-scaling layer, a sub-scaling layer includes only the bits of a certain order of a part of the binary spectral values in the band, so that, by additionally decoding a sub-scaling layer, a more finely controllable and a more finely scalable precision gain may be achieved.

摘要翻译： 一种用于对包括音频和/或视频信息的信号的频谱进行可分级编码的装置，其中包括二进制频谱值的频谱包括用于生成第一子缩放层和第二子缩放层的装置， 形成所述编码信号，所述用于形成的装置被实现为将所述第一子缩放层和所述第二子缩放层包括在所述编码信号中，所述第一和第二子缩放层可以彼此分开地解码。 与完全缩放层相反，子缩放层仅包括频带中二分谱值的一部分的一定顺序的位，使得通过附加地解码子缩放层，更精细地控制 并且可以实现更精细地扩展的精度增益。